Projection apparatus



June 10, 1930. H. H. STRONG PROJECTION APPARATUS Filed June 27. 192'? 5 Sheets-Sheet l H arryhfistrang M dtfomw June 10, 1930. s o 1,762,804

PROJECTION APPARATUS Hat-i3 H. Sir-0123 MM/ZmM June 10, 1930. STRONG V 1,762,804

PROJECTION APPARATUS Filed June 27. 1927 IIIIIIIIIIIIIIIIIIIIIIIIIIIILIIIIIII[IIIIII I I I I I I I I I Fig. 8

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June 10, 1930. H. H. STRONG 1,762,804

, PROJECTION APPARATUS Filed June 27. 1927 s Sheets-Sheet 4 A u B91////////////////: 5

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PROJECTION APPARATUS Filed June 27. 1927 Sheets-Sheet 5 'Figu Patented June 10, 193a UNITED sT Es PAr NTjfoFlf-lcu.

"HARRY a. STRONG, or ToLEno, OHIO, ASSIGNOR 'ro THE s'rnoue'nmc'rmc conronA J 'IION, or wrnmme'rou, DELAWARE, A CORPORATION or DELAWARE rnoarncrrou APPARATUS Application filed June 27,

invention relates to projection apparatus, and particularly to lamps for projecting both motion picture and stereopticon' slides, and the principal object of my invention is to provide a new and improved lamp of this type. In the drawings accompanying this specification and forming a part of this application I have shown, for purposes of il- I in showing the device in position for the projection of motion pictures;

Figure 2. is a view similar to Figure 1 showing the device in position of stereopticon slides;

Figure 3 is a rear end elevation;

re 4 is a side elevation taken from the right in Figures 1 and 2, and from the left in Figure 3; I

Figure 5 is a horizontal section taken on the Figure 6 is a section taken on the line 66 of Figure 4, showing particularly the front carbon holder and the interior of the nose, and showing the front carbon holder and the nose in motion picture projecting position; 2 i

- Figure 7 is a view similar to Figure 6 but showing the front carbon holder and the nose in stereopticon projecting position;

Figure 8 is a view similar to Figure 4 omitting parts to show more clearly the front carbon supporting and operating means, and the carbon operating mechanism; I

Figure 9 is a fragmentary sectionon the I line 9-9" of Figure 4 showing the rear carbon support; 1

Figure 10 is a fragmentary section on the line 1() 10 of Figure 9 showing the connection between the rear carbon holder and the supporting frame therefor;

igure 11 is a view similar to Figure 4 omitting parts to show more clearly the rear carbon operating and adjusting mechanism,

and the carbon operating mechanism;

F i ure 12 is-a detailshowing the connedtion etween the hand and motor drives-"for;

the carbon operating mechanism; 7

for the projection extending between the front and rear end 1927. Serial No. 201,909.

Figure 13 is a section on the line 13-13 showing the reflector and reflector support;

Figure 14 is a section on the-line 14-14 of Figure 13;

Figure 15 is a fragmentar view similar to Figure 4 omitting parts to s ow more clearly .thereflector support and adjustment; ;Figure16 is a fragmentary view combining the disclosure of Figures 8 and 11 and showing the parts in the position for storeopticon projection; while Figure 17 is'a detail showing the means for adjusting the relation between the throw of the arc and of the'nose between motion picture projecting position and stereop'ticon proecting position.

Thelamp herein shown is enclosed in a housing 21 comprisin front and rear end plates 22 and 23 provi ed with flanges 24 and 25 and united by suitable tierods 26 and 27; a top 28 extending between the front and rear end plates 22 and 23 secured to the flanges 24 and 25 and further unitin the front andrear end plates 22 and 23,.si e bases 29 also plates 22 and 23 secured to the flanges 24 and 25 and further uniting the front and rear end plates 22 and 23, doors 30 pivoted on the tie-. rods 27 and normally closing the space on the housing 21 between the lower edge of the top 28 and the upper edge of the corresponding side base 29, and a pair of carrier rods 31 3 and 32 secured to the front and rear end '36 overlying the projection aperture 37 in the front end plate22, provided with a motion picture projection aperture 38 containing a lens 39 and adapted to be closed by means of a plate '40'p1voted to the nose 36 at 41 and operable by means of a handle 42, provided also'w ith apair of apertures 43 for stereopt'icon' projection each having alined therewith a suitable slide holder 44 and each A p adapted to be closed means of a plate 45 secured to a shaft 46 pivoted in the correspondin -means 0 a handle 47 provided with a weight slide holder 44 and operable by 48 effective to hold the plate in either extreme position to which it has been moved, and movable about the carrier rod 32 between the position shown in Figure 1 wherein the motion picture projecting aperture 38 is alined with the front end plate aperture 37 and the position shown in Figure 2 wherein the stereopticon projecting apertures 43 are alined with the front end plate aperture 37.

The front carbon holder assembly 33 comprises a base 50 provided at one side with an ear 51 encircling the carrier rod 32, and at the other side with a fork 52 embracing the carrier rod 31, and carries secured thereto by suitable machine screws-53 a plate 54 from which rises a carbon supporting post 55 provided with a recess'56 in which the front carbon 57 is held firmly clamped in position by means of a strap 58 secured intermediate its end by means of a machine screw 59 to the carbon supporting post 55 and acting to clamp the carbon 57 by movement of its upper end 60 toward the carbon supporting post 55 and the carbon 57 as its lower end 61 is forced away from the carbon supporting post 55 by the action of the tip 62 of a pin 63 screwthreadedly engaging within a cooperatingly screw-threaded tube 64 carried by the plate 54, positioned with its tip 62 hearing against the lower end 61 of the strap 58, and operated lliy means of a conveniently positioned handle The rear carbon holder assembly 34 comprises a substantially square frame 65 provided at one lower corner with an ear 66 encircling the carrier/ rod 32, and at the other lower corner with a fork 67 embracing the carrier rod 31, provided intermediate its lower side 68 with a downwardly depending lug 69, and intermediate its upper side 70 with a segmental spherical recess 71 receiving and supporting for universal movement a cooperating segmental sphere 72 seated within the segmental spherical recess 71 and provided centrally with an aperture 73 in which is mounted an insulating sleeve 74 surrounding a rear carbon holder base 75 carrying projecting from the forward end thereof carbon gripping fingers 76 and 77 effective to support between them the rear carbon 78.

The segmental sphere 72 is held in position seated in the segmental'spherical recess 71, and the segmental sphere 7 2 and rear carbon 78 are angularly adjusted relative to the frame 65 to aline the rear carbon 78 with the front carbon 57, by two separate and independent adjusting means operating togther to secure the segmental sphere 72 seated within the segmental spherical recess 71, operating one to adjust the rear carbon 7 8 abouta su stantially vertical axis and the other to adjust the rear carbon 78 about a substantially horizontal axis, and the two therefore operating to provide a universal adjustment of the rear carbon 78 to permit movement of the rear carbon 78 in any direction.

The mechanism for adjusting the carbon holding segmental sphere 72 about the substantially'vertical axis comprises an arm 79 extending laterally from the segmental sphere 72, a tension spring 80 extending between the end of the arm 79 and the adjacent upper corner 81 of the frame 65, an arm 82 extending laterally from the segmental sphere 72 in the opposite direction from the arm 79 and provided at its end with a slot 83, and an adjusting rod 84 provided at its end with a section 83 screw-threaded to cooperate with a correspondingly screw-threaded aperture 86 in the upper corner 87 of the frame 65, provided with a reduced section 88 received within the slot 83 in the arm 82, recip upper side 70 of the frame 65, a tension spring 92 extending between the arm 90 and the arm 91, an arm 93 extending downwardly from the segmental-sphere 72 and provided at its lower end with a slot 94, and a rod 95 provided at its end with a screw-threaded section 96 adapted to engage a cooperating screwt-hreaded aperture 97 in the arm 69 projecting downwardly from the lower side of the frame 65, provided with a reduced extension 98 received within the slot 94 of they arm 93, reciprocable through a suitable aperture in the rear end plate 23 to permit reciprocation of the rear carbon assembly 34, provided at its rear end with an operating handle 99, and effective to draw the segmental-sphere arm 93 toward the frame arm 69 to thus swing the rear carbon 78 upwardly against the action of the tension spring 92 until the rear carbon 78 has assumed the desired vertical position.

The front and rear carbon assemblies 33 and 34 are reciprocated along the carrier rods 31 and 32 to effect approach and recession of the front and rear carbons 57 and 78 by means of a screw unit 100 rotatably and reciprocably mounted inthe 'front and rear end plates 22 and 23, provided over its forward portion with a left-hand-screw section 101 engaging within a cooperatively screwthreaded aperture 102 in an arm 103 extending downwardly and forwardly from the rear carbon supporting frame 65, provided 1 meaeoe over its rear portion with a right-hand-screw section 104 engaging within a cooperatingly by means of a key 159 projecting from thefriction disc 161 into an elongated key-way 158 in the extension 109, by means of an electric motor 110 connected to the screw unit I 100 by an intermediate shaft 111 which is driven from, the motor 110 by a Worm112 carried on the motor shaft 113 engaging a cooperating worm gear 114carried on-the' upper end of the intermediate shaft 111, and which drives through a worm 115 carried on the lower end of the intermediate shaft 111 engaging a cooperating worm gear 116 rotatable on the extension 1090f the screwrunit 100 but held in frictional engagement with the friction disc 161 by means of a spring 117 compressed between the friction disc 161 and the rear end of the section 104 of the screw unit 100 and tending to clamp the worm gear 116 between the friction disc 161 and a ball-bearing unit 118 interposed between the worm gear 116 and the inner' faceof the rear end plate 23 to eliminate friction between the worm gear 116 and the rear end plate 23. 7

It will be understood by those skilled in the art that the handle 108 will ordinarily be used in striking and adjusting the arc, and that thereafter the motor 110, controlled in any suitable manner, will operate tomaintain the arc in proper adjustment.

The reflector assembly 35 comprises a sub-' stantially square frame 119 provided atone .lower corner with an ear 120 encircling the carrier rod 31, and at the other lower corner with a fork 121 embracing the carrier rod 32, and provided intermediate'its upper side 122 with a segmental spherical recess 123 supporting a cooperating segmental sphere 124 universally movable within the segmental spherical recess 123, provided centrally with an aperture 125 for the free passage of the rear carbon 7 8, and carrying, by means of a spider 126, and fingers 127, a reflector 128 provided with a cent/ra laperture 129 for the passage of the rear carbon 78, held in position against the overhanging ends 130 of the fingers 127 by means of a spring holding finger 131 secured to the spider 126 engaging the rear face of the reflector 128 and acting to move the reflector 128 forward against the over-hanging ends 130 of the fingers 127,

adapted with the are between the front and rear carbons 57 and 78 in one position. to focus the light from the arc onto the lens and adapted with the arc in another position to reflect the light from the are as a parallel beam illuminating the stereopticon projecting apertures 43 of the nose 36,

The segmental sphere 124 is held in position within the segmental spherical recess 123, and the segmental sphere 124 and the 30 arried in the aperture 38 of'the nose 36,

reflector 128 are adjusted universally relative to the reflector frame 119, by means of two separate and independent adjusting 'means together effective to hold the segmental sphere 124 v seated within the segmental spherical recess 123, operating one to adjust the reflector 128 about a substantially vertical axis and the other to adjust the reflector 128 about a substantially horizontal axis, and the two serving to provide conjointly universal adjustment of the reflector 128 I upon the reflector assembly frame 119.

The mechanism for adjusting the reflector 128 about the substantially vertical axis comprises a tension spring 132 extending between the upper corner 133 of the frame 119 and the adjacent arm 134 of the spider 126, and a rod 135 providedwith a screw-threaded section 136 engaging within a cooperatingly screw-threaded aperture 137 formed in the upper corner138 of the frame 119, provided with a reduced extension 139 extending through aslot 140 of the adjacent arm 141 of the spider 126 and terminating in a head 142 overlying the forward face of the spider'arm 141 adjacent the slot 140, reciprocable through a suitable aperture in the rear end frame 23 to permit adjusting reciprocation of the reflector assembly'35, operable by means of a handle, 143 disposed rearwardly of the rear 138 of the frame 119 against the action of the tension spring 132 to thus swing the reflector 128 about a substantially vertical axis until it ,has assumed-the desired lateral position; while the mechanism for adjusting the reflector 128 about the substantially horizontal axis comprises atension spring 144 extending between the lowest portion of the rim 145 of the spider 126 and the center of the lower cross bar.1 46 of the frame 119, an arm 147 extending upwardly from the central portion of the upper cross bar 122 of the frame119, and a rod 148 provided with a screw-threaded section 149 engaging within a cooperatingly screw-threaded aperture 150 formed in the end of the arm 147, provided with a reduced extension 151 extending through aslot- 152 in an arm 153 of the spider 126 and terminating in a-n enlarged head 154 overlying the inner face of the spider arm 153 adjacent the slot 152, reci-p'rocable through a suitable aperture in the rear end plate 23 to end plates 22 and 23, extending rearwardly of the rear plate 23, provided on its rear end with an operating handle 160, provided with a screw-threaded section 162 engaging a cooperatingly screw-threaded aperture 163 in an arm 164 extending downwardly and rear- Wardly from the frame 119 of the reflector assembly 35, and operable to adjust the reflector 128 by reciprocation of the frame 119 and reflector 128 produced by rotation of the control'rod 156 through the coaction of the screwthreaded section 162 of the rod 156 and the cooperatingly screw-threaderi s aperture 163 in the arm 164 of the reflector a embly 35. The embodiment of my invention herein shown comprises also a cone 167 provided with a screw-threaded aperture 168 engaging the cooperatingly screw-threaded extension 157 of the screwunit 100,-adjustable by 00- action of the screw-threaded extension 157 166 depending from the lower edge of the nose 36., and operating, upon bodily advance of the screw unit 100, and therefore of the are, from stereopticon projection position to cinematographic projection position, to automatically shift the nose 36 from stereopticon projecting position to cinematographic projecting position,'the nose 36 returning to stereopticon projection position by gravity upon retraction of the screw unit 100 and the arc to stereopticon projection, and the screw unit 100 being held'in either position by engagement in annular grooves 172- and 173 formed in the extension 109 of a finger 174 carried by a detent 49 pivoted to the rear end plate 23 at 175.

From the above description it will be obvious to those skilled in the art that I have provided a lamp for the projection of motion pictures and stereopticon slides embodying and providing improved light beam producing mechanism, improved reflector adjusting mechanism, and improved rear carbon adjusting mechanism, and accordingly it will be obvious to those skilled in the art that I have provided a lamp accomplishing at least a the principal object of my invention. At the same time it also will be obvious to those skilled in the art that the particular embodiment of my invention herein shown and disclosed embodies advantages other than those particularly pointed out or suggested herein, and also that this particular embodiment of my invention may be variously changed and modified without sacrificing these advantages or departing from the spirit of my invention, and it therefore will be understood that the disclosure herein is illustrative only, and that my invention is not limited thereto.

I claim:

1. Projection apparatus comprising: a Ililtyising; movable light beam producing echanism disposed withinsaid housing, comprising movable light-producing means, comprising also reflector means cooperating with said light-producing means to produce a light beam, and variable by movement of said light producing means to vary the focus of said light beam; movable nose mechanism connected to said housing, provided with a pair of openings for the passage of light therethrough, and movable between a position in which one of said openings is in operative relation to'sa-id light beam and a position in which the other of said openings is in operative relation to said light beam; and means whereby such movement of said lightproducing means automatically effects such movement of said nose mechanism.

2. Projection apparatus comprising: a 109 housing; movable light-beam-producing mechanism disposed within said housing comprising light-producing means, comprising also I reflector means cooperating with said light-producing meansv to produce a light beam, said light-,producing means being movable toward and from said reflector means and said light-beam-producing mechanism being variable by approach and recession of said light-producing means toward and from said reflector means to vary the focus of said light beam; movable nose mechanism connected to said housing, provided with a pair of openings for the passage of light therethrough, and movable between a position in which one of said openings is in operative relation to said light beam and a; position in which the other of said openings is in operative relation to said light beam and means whereby such movement of said light-beam-producing mechanism automatically effects such movement of said nose mechanism.

In testimony whereof I hereunto aflix my I signature.

HARRY H. STRONG. 

